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share/mk: support for "single" group options

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Support group options where 1 of n values will be selected (or a default
value will be used).  After processing, an OPT_FOO will be set to one
value from __FOO_OPTIONS for each FOO in __SINGLE_OPTIONS.  If the user
sets FOO that value will be used, otherwise __FOO_DEFAULT will be used.

Options that don't work an a particular system can be remapped to an
alternative using BROKEN_SINGLE_OPTIONS which can be set to a list of
3-tuples of the form:
	OPTION broken_value replacement_value

This is somewhat inspired by OPTIONS_SINGLE from ports, but the
structure is quite different with a per-option variable in the style of
MK_FOO={yes,no}.

Reviewed by:	imp, emaste
Differential Revision:	https://reviews.freebsd.org/D41659
This commit is contained in:
Brooks Davis 2023-09-01 17:41:07 +01:00
parent 565c887a77
commit ce5fa47cf0
2 changed files with 64 additions and 1 deletions
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38
share/mk/bsd.mkopt.mk
View file

@ -1,7 +1,7 @@
#
#
# Generic mechanism to deal with WITH and WITHOUT options and turn
# them into MK_ options.
# them into MK_ options. Also turn group options into OPT_ options.
#
# For each option FOO in __DEFAULT_YES_OPTIONS, MK_FOO is set to
# "yes", unless WITHOUT_FOO is defined, in which case it is set to
@ -31,6 +31,15 @@
# system should use MK_FOO={yes,no} when it needs to override the
# user's desires or default behavior.
#
# For each option in __SINGLE_OPTIONS, OPT_FOO is set to FOO if
# defined and __FOO_DEFAULT if not. Valid values for FOO are specified
# by __FOO_OPTIONS.
#
# Other parts of the build system will set BROKEN_SINGLE_OPTIONS to a
# list of 3-tuples of the form: "OPTION broken_value replacment_value".
# This will not be unset before returning. Clients are expected to
# always += this variable.
#
#
# MK_* options which default to "yes".
@ -93,6 +102,33 @@ MK_${var}:= no
MK_${var}:= no
.endfor
#
# Group options set an OPT_FOO variable for each option.
#
.for opt in ${__SINGLE_OPTIONS}
.if !defined(__${opt}_OPTIONS) || empty(__${opt}_OPTIONS)
.error __${opt}_OPTIONS undefined or empty
.endif
.if !defined(__${opt}_DEFAULT) || empty(__${opt}_DEFAULT)
.error __${opt}_DEFAULT undefined or empty
.endif
.if defined(${opt})
OPT_${opt}:= ${${opt}}
.else
OPT_${opt}:= ${__${opt}_DEFAULT}
.endif
.if empty(OPT_${opt}) || ${__${opt}_OPTIONS:M${OPT_${opt}}} != ${OPT_${opt}}
.error Invalid option OPT_${opt} (${OPT_${opt}}), must be one of: ${__${opt}_OPTIONS}
.endif
.endfor
.undef __SINGLE_OPTIONS
.for opt val rep in ${BROKEN_SINGLE_OPTIONS}
.if ${OPT_${opt}} == ${val}
OPT_${opt}:= ${rep}
.endif
.endfor
.for vv in ${__DEFAULT_DEPENDENT_OPTIONS}
.if defined(WITH_${vv:H}) && defined(WITHOUT_${vv:H})
MK_${vv:H}?= no

27
sys/conf/kern.opts.mk
View file

@ -141,6 +141,33 @@ MK_${var}:= no
MK_${var}:= no
.endfor
.undef BROKEN_OPTIONS
#
# Group options set an OPT_FOO variable for each option.
#
.for opt in ${__SINGLE_OPTIONS}
.if !defined(__${opt}_OPTIONS) || empty(__${opt}_OPTIONS)
.error __${opt}_OPTIONS not defined or empty
.endif
.if !defined(__${opt}_DEFAULT) || empty(__${opt}_DEFAULT)
.error __${opt}_DEFAULT undefined or empty
.endif
.if defined(${opt})
OPT_${opt}:= ${${opt}}
.else
OPT_${opt}:= ${__${opt}_DEFAULT}
.endif
.if empty(OPT_${opt}) || ${__${opt}_OPTIONS:M${OPT_${opt}}} != ${OPT_${opt}}
.error Invalid option OPT_${opt} (${OPT_${opt}}), must be one of: ${__${opt}_OPTIONS}
.endif
.endfor
.undef __SINGLE_OPTIONS
.for opt val rep in ${BROKEN_SINGLE_OPTIONS}
.if ${OPT_${opt}} == ${val}
OPT_${opt}:= ${rep}
.endif
.endfor
#end of bsd.mkopt.mk expanded inline.
#